russell



H. E. RUSSELL, Jr.

(Model.) 3 Sheets-Sheet 1.

MASTER KEY LOOK.

Patented 0ct. 14, 1890.

(Model.) 3 Sheets-Sheet 2.

HQE. RUSSELL, Jr. MASTER KEY LOOK.

No. 438,188. Patented Oct. 14, 1890.

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Patented Oct. 14,1890.

(ModeL) H. E. RUSSELL, Jr. MASTER KEY LOCK.

1| I l H ll l B "I lmi l O [m 5 I [IE/5'6 3 5 l g If I A I 5 8 8 HENRYE. RUSSELL, J R., OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL &ERVIN MANUFACTURING COMPANY, OF SAME PLACE.

MASTER-KEY LOCK.

SPECIFICATION forming part of Letters Patent No. 438,188, dated October14., 1890.

Application filed March 11, 1890. Serial No. 343,452. (ModeL) To allwhom it may concern.-

Be it known that I, HENRY E. RUSSELL, J r., a citizen of the UnitedStates, residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMaster-Key Locks, of which the following is a specification.

My invention relates to improvements in master-key locks; and theobjects of my improvement are to improve the convenience and generalefficiency of the lock, and in particular to make a clear distinctionbetween the master-key and individual keys.

In the accompanying drawings, Figure 1 is a front elevation of my lockwith the capplate removed, the lock-bolt being thrown outwardly. Fig. 2is a front elevation of a portion of the same with the lock-boltwithdrawn. Fig. 3 is a vertical section on line a; 00 of Fig. 1. Fig. atis a front elevation of one of the tumblers. Fig. 5 is a detached frontelevation of the lock-bolt, and Fig. 6 is a front elevation of my lockin a somewhat modified form.

A designates the lock-bolt, the same being shown separatelyin Fig. 5,and it is provided with talons 7for being directly acted upon by thekey, and also with talons 8 for being acted upon by the tumbler-lockedkey-actuated mechanism 9, mounted within the lock-cylinder 10, which isformed separately from the case and secured thereto, the interiormechanism and keys of which cylinder may be of any ordinary constructionfor this well-known class of looks. The hub or cam is locked by means oftumblers within the cylinder 10, which tumblers are released by the key,so that the key-actuated mechanism 9 is not merely moved by the key, butits tumblers are key-actuated preparatory to its movement in throwingthe bolt. I also provide said lockbolt with aseries of tumblers B,having shoulders 11, for engagement of a stationary stud 12 on thelock-case to prevent the bolt from being withdrawn, except when thetumblers are properly lifted, all substantially as in or dinary lockshaving platetumblers acted upon by the direct action of the key, thetumblers, as usual, being provided with edge faces 13 to be acted uponby the wing of the key.

The bearing for one end of this key in Figs. 1, 2, and 3 is in the formof a socket 14, adapted to receive the-end of the stem of a solid key,while in Fig. 6 it is in the form of a pin 15, which is adapted for adrilled key.

The key-holes for application of the proper keys for the plate-tumblersand the key-actuated mechanism are both on the same side of thelock-case.

In the preferred form I operatively connect the tumblers B with thekey-actuated mechanism 9 by having one of the tumblers 16 provided witha carrier 17, which is rigidly attached to said tumbler, and upon theupper face of which carrier all of the other tumblers rest. The lowerpart of this carrier 17 lies within the space between the talons 8 8,whereby whenever the key-actuated mechanism 9 is released and revolvedby the application of a proper key it engages said carrier 17 and liftsall of the tumblers B, so that it may throw the bolt. When a key isapplied to act upon the talons 7 7, the tumblers are lifted by thedirect action of the key. Thus it will be seen that the bolt may bethrown either by the application of a key which acts directly upon thetumblers and lock-bolt or by the application of a key to release and actupon the key-actuated mechanism, and these two keys will ordinarily bevery different in form and construction, and either one of them may bemade a master-key, so as to operate a given number of locks,while theother may be made a change key or individualkey capable of operatingonly the particular lock for which it was designed.

In Fig. 6, instead of making the carrier integral with one of thetumblers, I make the carrier 17 of a separate piece and pivot it to thelock-bolt at 18. As in the construction first described, its lower partrests between the talons 8 8, and all of the tumblers rest upon itsupper edge, said edge in Fig. 6 being designated 19, whereby Wheneverthe keyactuated mechanism 9 is operated to throw the bolt all of thetumblers in the series B will be properly lifted.

I claim as my invention- 1. The combination of a case, a series of moplate-tumblers adapted to be acted upon by for a key-actuated mechanism,in combine the direct application of a key, a cylinder tion with akey-actuated mechanism, and a formed separately from the lock-case, aset of carrier adapted to be operated by said keytumblersandkey-actuated mechanism monnt- I actuating mechanism for operating thetum- 15 5 ed Within said cylinder, and a lock-bolt, the blers,substantially as described, and for the plate-tumblers and key-actuatedmechanism purpose specified.

both bein 'accessible to the proper keys from the same side of thelock-case, substantially HENRY RUSSELL as described, and for the purposespecified. Vitnesses:

1o 2. A lock-bolt having talons and tumblers THOS. S. BISHOP,

for the direct application of a key and talons M. S. WIARD.

